Table 2.

Comparison of clinical and pathological features of young (YP) and elderly (OP) RCC patients.

	YP (70 patients) No. (%)	OP (150 patients) No. (%)	p Value
Sex			< 0.001
Female	17 (24%)	86 (57%)
Male	53 (76%)	64 (43%)
Sex ratio (male/female)	3.1	0.7
Clinical presentation			p = 0.19
Symptomatic	20 (28.4%)	52 (34,5%)
Asymptomatic	50 (71.6%)	98 (65.5%)
WHO 2002 stage of primary tumor			p = 0.03
pT1- pT2, N0, M0	60 (85.7%)	101 (67.3%)
pT3, N0, M0	7 (10.0%)	29 (19.3%)
pT4 and/or N+, and/or M+	3 (4.3%)	20 (13.4%)
Tumor grade			p = 0.01
Grade 1	24 (34,3%)	24 (16.0%)
Grade 2	35 (50.0%)	110 (73.3%)
Grade 3	11 (15.7%)	16 (10.7%)
RCC subtypes:			p = 0.32
Clearcell RCC	47 (67.2%)	98 (65.3%)
Papillary RCC	13 (18.6%)	29 (19.4%)
Chromophobe RCC	5 (7.1%)	16 (10.7%)
Other histological types	5 (7.1%)	7 (4.6%)

bold face representing p-values < 0.05

RCC = renal cell carcinoma